Compared to arteries, veins:
A. have greater muscle content in their walls.
B. are a low-pressure system.
C. have bidirectional valves.
D. rely on gravity for venous return.
B
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One problem with electronic health records is that
A) Two people, in two different places, can access the same record at the same time B) Only younger staff members learn the system quickly–older staff take longer to learn new things C) If the power goes out, you do have not access to the records D) The systems can be very expensive to install and train staff to use
Which of the following statements about respiratory accessory muscles is not correct?
a. They are recruited whenever the body's oxygen demand exceeds oxygen availability. b. They include chest, shoulder, and abdominal muscles. c. They bring more oxygen into the body by helping the chest wall expand more fully. d. They decrease negative internal chest pressure to draw more air into the lungs.